// SPDX-License-Identifier: GPL-2.0-only
#ifndef _BROILER_BIOS_VESA_H
#define _BROILER_BIOS_VESA_H

typedef struct {
	u16 off, seg;
} far_ptr;
        
/* VESA General Information table */
struct vesa_general_info {
	u32 signature;          /* 0 Magic number = "VESA" */
	u16 version;            /* 4 */
	far_ptr vendor_string;  /* 6 */
	u32 capabilities;       /* 10 */
	far_ptr video_mode_ptr; /* 14 */
	u16 total_memory;       /* 18 */

	u8 reserved[236];       /* 20 */
} __attribute__ ((packed));

#define VESA_MAGIC ('V' + ('E' << 8) + ('S' << 16) + ('A' << 24))
#define VESA_WIDTH	640
#define VESA_HEIGHT	480

#define VESA_MEM_ADDR	0xd0000000 
#define VESA_BPP	32
#define VBE_STATUS_OK	0x004F

struct vesa_mode_info {
	u16 mode_attr;          /* 0 */
	u8 win_attr[2];         /* 2 */
	u16 win_grain;          /* 4 */
	u16 win_size;           /* 6 */
	u16 win_seg[2];         /* 8 */
	far_ptr win_scheme;     /* 12 */
	u16 logical_scan;       /* 16 */

	u16 h_res;              /* 18 */
	u16 v_res;              /* 20 */
	u8 char_width;          /* 22 */
	u8 char_height;         /* 23 */
	u8 memory_planes;       /* 24 */
	u8 bpp;                 /* 25 */
	u8 banks;               /* 26 */
	u8 memory_layout;       /* 27 */
	u8 bank_size;           /* 28 */
	u8 image_planes;        /* 29 */
	u8 page_function;       /* 30 */

	u8 rmask;               /* 31 */
	u8 rpos;                /* 32 */
	u8 gmask;               /* 33 */
	u8 gpos;                /* 34 */
	u8 bmask;               /* 35 */
	u8 bpos;                /* 36 */
	u8 resv_mask;           /* 37 */
	u8 resv_pos;            /* 38 */
	u8 dcm_info;            /* 39 */

	u32 lfb_ptr;            /* 40 Linear frame buffer address */
	u32 offscreen_ptr;      /* 44 Offscreen memory address */
	u16 offscreen_size;     /* 48 */

	u8 reserved[206];       /* 50 */
} __attribute__ ((packed));

#endif
